Abstract: Data characterizing a fastener and a preload condition applied to the fastener are received in a computer system. A model representing a mechanism coupling a first portion and a second portion of the fastener is created. The first portion and the second portion are located respectively at either end of the fastener along a longitudinal axis of the fastener. The first portion and the second portion are axially displaceable along the axis towards each other via the mechanism and rotatably displaceable about the axis relative to each other via the mechanism. The model includes relative axial displacement and/or relative torsional displacement between the first portion and the second portion corresponding to the preload condition. Physical behaviors of the fastener applied with the preload condition is simulated based on the model.

Abstract: A laser processing method for laser processing of a workpiece made of a base material and a fiber reinforced composite material containing fibers having a thermal conductivity and a processing threshold higher than physical properties of glass fibers. The laser processing method includes a step of processing the workpiece by forming a plurality of through-holes extending through the workpiece by irradiating the workpiece with pulsed laser light from a processing head while relatively moving the workpiece and the processing head in a predetermined cutting direction. The pulsed laser light has a pulse width smaller than 1 ms and an energy density capable of forming each of the through-holes by a single pulse.

Abstract: The present invention is relative to a scanning device (100) of a laser light beam (7,8) for reading coded information, comprising: an emission source of a laser light beam (7,8), the laser light beam defining an optical path (10a,10b); an optical element (17) for scanning the laser light beam on a support containing coded information; characterized in that it further comprises a linear polarizer (16) located along the optical path (10a,10b) of said laser light beam (7,8), upstream the optical element for scanning (17), said polarizer being apt to linearly polarize a first portion of said laser light beam in substantially one first plane (s) and direct said polarized portion only towards said optical element for scanning.

Abstract: A lidar system includes a light source configured to emit pulses of light, a scanner configured to direct the pulses of light along a scan direction, and a receiver with a detector configured to detect the pulses of light scattered by remote targets. For a pulse of light emitted by the light source, the receiver is configured to detect the scattered pulse of light returning to the receiver during a ranging time interval between (i) when the pulse of light leaves the lidar system and (ii) when the scattered pulse of light returns from a remote target positioned at a maximum distance RMAX. For at least a portion of the ranging time interval, the lidar system directs the scattered pulse of light toward the active region of the detector at an oblique angle to reduce an amount of light impinging on the active region.

Abstract: A security system includes a plurality of laser scanners to establish light shields in an area to be monitored, with each of the light shields including at least one detection zone, and a controller to detect unauthorized entry to the area to be monitored based on a position and timing of breaks in the detection zones of the light shields.

Abstract: A security system includes a plurality of laser scanners to establish light shields in an area to be monitored, with each of the light shields including at least one detection zone, and a controller to detect unauthorized entry to the area to be monitored based on a position and timing of breaks in the detection zones of the light shields.

Abstract: An improved prismatic polygonal reflector with increased aerodynamic properties and reduced scattering of reflected light is provided. The reflector may be used for scanning, and may include a first end, a second end, a plurality of side surfaces located circumferentially about a center axis of the reflector, and a plurality of intersections joining the plurality of side surfaces. Each of the plurality of intersections includes a curved or a flat portion and a pointed portion aligned circumferentially with other pointed portions on the plurality of intersections to provide a circumference around the reflector for light to reflect and form a scanning beam without light scattering. A system and method for scanning with the reflector is also provided.

Abstract: The light deflection unit including a rotary member having a rotor frame formed of a plate of a metal, and a rotary polygon mirror configured to rotate together with the rotor frame and deflect a light beam emitted from a light source, in which a mass of the rotor frame is largest among masses of a plurality of members forming the rotary member, the mass of the rotor frame is smaller than 3 g, and a thickness of the plate of metal is set within a range in which a stress amplitude of a portion of the rotor frame on which a largest stress is exerted during rotation of the rotor member becomes smaller than a fatigue limit of the metal.

Abstract: Certain aspects of the disclosure relates to a laser beam collimation apparatus and a manufacturing method thereof. In one exemplary embodiment, the laser beam collimation apparatus includes a laser and a collimating lens disposed opposite the laser, in which the laser is mounted on a laser seat, and the collimating lens is mounted on a collimating lens seat. A transparent rigid ring is provided between the collimating lens seat and the laser seat, and at least one gap is provided between the transparent rigid ring and the laser seat and between the transparent rigid ring and the collimating lens seat, and the at least one gap is filled with a photosensitive adhesive, wherein the at least one gap comprises at least one of a first gap between the transparent rigid ring and the laser seat and a second gap between the transparent rigid ring and the collimating lens seat.

Abstract: In a light deflector including a polygon mirror having a plurality of reflecting surfaces; and a motor configured to rotate the polygon mirror, each of the reflecting surfaces, which has leading and trailing edges with respect to a direction of rotation of the polygon mirror and a center between the two edges, is configured to curve with the center displaced with respect to a reference straight line passing through the two edges in a plane perpendicular to an axis of rotation of the polygon mirror, radially, to a first side under a non-operating state in which the motor is not in operation, and to a second side (opposite to the first side) under a first rotating state in which progress of deformation of each of the reflecting surfaces has converged after a lapse of a first period of time from a start of rotation of the motor.

Abstract: A platform mapping tool for mapping a weapon platform includes a mandrel inserted in one of a weapon barrel and a weapon replacement fixture barrel. The tool generates a laser cone centered on the bore centerline of the weapon. The laser cone illuminates a defined cone of dispersion of ammunition. Areas where the laser cone intersects the weapon platform correspond to undesirable weapon firing positions. The undesirable firing positions can be digitized and loaded into the weapon's fire control system.

Abstract: An scanning unit scanner includes a light source and a polygon mirror unit. A front-to-rear rib is disposed between the light source and the polygon mirror unit and near the polygon mirror unit. An input side opening having a slit shape is formed as a cutout in the top edge of the front-to-rear rib. When laser light from the light source passes through the input side opening, the input side opening restricts the width of the light in a main scanning direction.

Abstract: An optical scanning unit includes a rotatable multi-faceted mirror having a plurality of faces reflecting light flux emitted from a light source to scan a scanning area in a main scanning direction. A width of the light flux striking the rotatable multi-faceted mirror is smaller than a length of a face of the rotatable multi-faceted mirror. The entire of light flux striking the rotatable multi-faceted mirror is reflected at a first face when the light flux reflected by the rotatable multi-faceted mirror is directed to the center portion of the scanning area. A part of the light flux striking the rotatable multi-faceted mirror is reflected at the first face while the remaining of the light flux is reflected at a second face when the light flux reflected by the rotatable multi-faceted mirror is directed to a least one of the two end portions of the scanning area.

Abstract: An optical scanning device includes an air-tight casing, an air-tight container and a tube-like member. The air-tight casing is configured to accommodate at least a polygon mirror and a driving unit that rotates the polygon mirror. The air-tight container is disposed at a distance from the air-tight casing and outside an outer wall surface vertically above the air-tight casing. The tube-like member is configured to communicatively connect an inside of the air-tight casing and an inside of the air-tight container.

Abstract: A scanning apparatus operable in the microwave, mm-wave, sub mm-wave (Terahertz) and infrared ranges comprises a primary drum (10) mounted for rotation about a central axis A of the primary drum being hollow and of rectangular polygonal form to provide a number of sides or facets (12, 14) each adapted to transmit such radiation, from a field of view, which is plane polarized in a first direction at 45° with respect to the rotary axis of the drum and to reflect radiation which is plane polarized in an orthogonal direction. Thus, radiation passing into the drum though whichever said side of the drum is currently facing the field of view and passing towards the diametrically opposite side will be plane polarized with a polarization direction such as to be reflected back by that diametrically opposite side towards the rotary axis of the drum.

Abstract: A light-scanning device includes a polygon scanner having a rotatable polygon mirror which deflects a laser beam emitted from a light source, an optical image-forming element which images the deflected laser beam on a predetermined position, and an optical housing which supports the light source, the polygon scanner and the optical image-forming element, a non-rotational cylindrical shielding member for covering an upper part of the polygon scanner.

Abstract: An optical device including: a laser light emitting portion that emits laser light; a polygon mirror having a reflective surface that reflects the laser light, the polygon mirror being driven to rotate and deflecting the laser light emitted from the laser light emitting portion; a first lens through which the laser light reflected by the polygon mirror is transmitted, the first lens refracting the laser light; a second lens through which the laser light having passed through the first lens is transmitted, the second lens refracting the laser light; and an adjustment unit that adjusts at least one of a length of a first optical path between the polygon mirror and the first lens, and a length of a second optical path between the first lens and the second lens.

Abstract: An enclosure includes a first enclosure and a second enclosure. A deflector deflects a light emitted from a light source. A first optical system leads the light emitted from the light source to the deflector. A second optical system includes at least one optical element, and leads the light deflected by the deflector onto a surface to be scanned. The first enclosure holds the light source, the deflector, and the first optical system, and the second enclosure holds the at least one optical element included in the second optical system.

Abstract: F-theta lenses, included in scanning lens systems, are arranged on a main scanning plane facing an optical deflector and substantially linearly symmetrically on the main scanning plane with reference to a rotational center of the optical deflector. Each f-theta lens has a no-power portion in the main scanning direction. Synchronization-detecting light passes through the no-power portion of the f-theta lens, thus enabling reduction in color shift due to temperature variation in an image forming apparatus without increasing the cost and complexity in controlling color shift.